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<h1 class="topictitle1">周期性执行备份</h1>
<div><p>将需要保护的数据库关联到指定SLA，系统将对这些数据库按照SLA的定义周期性执行备份。</p>
<div class="section" id="ZH-CN_TOPIC_0000001839142277__section6820103205519"><h4 class="sectiontitle">前提条件</h4><ul id="ZH-CN_TOPIC_0000001839142277__ul1705111720557"><li id="ZH-CN_TOPIC_0000001839142277__li1179163118565">备份前需要确保代理主机已安装pexpect包，建议安装pexpect3.2，下载和安装pexpect请参见<span id="ZH-CN_TOPIC_0000001839142277__cite3112856101217">《OceanProtect <span id="ZH-CN_TOPIC_0000001839142277__zh-cn_topic_0000001792502994_ph19170214112011">备份一体机 1.5.0-1.6.0</span> ProtectAgent安装指南》</span>中的“安装pexpect”章节。</li><li id="ZH-CN_TOPIC_0000001839142277__li370514178553">执行备份操作时，GBase 8a数据库需正常运行，集群各节点网络连接正常。</li><li id="ZH-CN_TOPIC_0000001839142277__li343514345517">执行备份操作时，GBase 8a代理主机和数据库用户的密码不能更改。</li></ul>
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<div class="section"><h4 class="sectiontitle">操作步骤</h4><ol><li><span>选择<span class="uicontrol" id="ZH-CN_TOPIC_0000001839142277__zh-cn_topic_0000001839142185_zh-cn_topic_0000001839142377_uicontrol33821026133719">“<span id="ZH-CN_TOPIC_0000001839142277__zh-cn_topic_0000001839142185_zh-cn_topic_0000001839142377_text538292610378">保护</span> &gt; 数据库 &gt; 通用数据库”</span>。</span></li><li><span>勾选要保护的数据库，单击<span class="uicontrol">“<span>保护</span>”</span>。</span></li><li><span>选择SLA。可选择系统预置SLA，或单击<span class="uicontrol">“<span>创建</span>”</span>，创建新的SLA。</span></li><li><span>单击<span class="uicontrol" id="ZH-CN_TOPIC_0000001839142277__zh-cn_topic_0000001792503842_uicontrol471113581111">“确定”</span>。</span><p><p id="ZH-CN_TOPIC_0000001839142277__zh-cn_topic_0000001792503842_p25041111535">如果当前系统时间已晚于该SLA首次备份的开始时间，则关联备份SLA后可以选择在当前立即执行备份或者根据SLA中设置的备份策略等待下次调度。</p>
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<div class="parentlink"><strong>父主题：</strong> <a href="zh-cn_topic_0000001839222217.html">步骤5：执行备份</a></div>
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